/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.aop.framework.adapter;

/**
 * Singleton to publish a shared DefaultAdvisorAdapterRegistry instance.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @author Phillip Webb
 * @see DefaultAdvisorAdapterRegistry
 */
public final class GlobalAdvisorAdapterRegistry {

    private GlobalAdvisorAdapterRegistry() {
    }


    /**
     * Keep track of a single instance so we can return it to classes that request it.
     */
    private static AdvisorAdapterRegistry instance = new DefaultAdvisorAdapterRegistry();

    /**
     * Return the singleton {@link DefaultAdvisorAdapterRegistry} instance.
     */
    public static AdvisorAdapterRegistry getInstance() {
        return instance;
    }

    /**
     * Reset the singleton {@link DefaultAdvisorAdapterRegistry}, removing any
     * {@link AdvisorAdapterRegistry#registerAdvisorAdapter(AdvisorAdapter) registered}
     * adapters.
     */
    static void reset() {
        instance = new DefaultAdvisorAdapterRegistry();
    }

}
